I've this patch applied - and it still gives me the same error.(using 6aba74f2791287ec407e0f92487a725a25908067 and this patch)

Here are my RCU config options:

# grep RCU .config# RCU SubsystemCONFIG_TREE_PREEMPT_RCU=yCONFIG_PREEMPT_RCU=yCONFIG_RCU_TRACE=yCONFIG_RCU_FANOUT=64# CONFIG_RCU_FANOUT_EXACT is not setCONFIG_TREE_RCU_TRACE=yCONFIG_PROVE_RCU=y# CONFIG_PROVE_RCU_REPEATEDLY is not set# CONFIG_SPARSE_RCU_POINTER is not set# CONFIG_RCU_TORTURE_TEST is not setCONFIG_RCU_CPU_STALL_DETECTOR=yCONFIG_RCU_CPU_STALL_TIMEOUT=60CONFIG_RCU_CPU_STALL_DETECTOR_RUNNABLE=yCONFIG_RCU_CPU_STALL_VERBOSE=y